peters



2 Sheets-Sheet 2.. W. J. KEEP.

Stove Pipe Damper.

- No. 100,641. I Patented March 8, 1870.

fnW/dr u N PETERS. moulhogrzphu. Wuhinghn. D. C.

To calla-ham it may concern.- V a a, i Be it known that I, WILLIAM J Knmyof Troy, in' the county of Rensselaerfand in the State of New York, have invented certain newand useful Improvementsin Stove-Pipe Dampers; and do hereby declare that the following is a full, clear, and exact description thereof, reference beingjhad to the accompanying forth. a a l a It further consists in causing the spring of the pipe aited mug gaunt Ghilili fWI L AM,Jpknnr, or TROY, NEW YORK.

' 1' 1 L tters mam. 100,641, dated March 8, 1870.

swovmm n DAMPER. m

The Schedule referred to in tlzieseIaettera Patent and making part ofthe same.

drawing making a part of this specification, in \i'hich- Figurefl is a front'elevation of a combined register and'dainper connected together by means of myimproved-method;

Figures 2 and itare a central longitudinal sectionand a top View, respectively, of the same,

Figure 4 is alfront elevation of" a section of pipe having damperattached thereto by means of a modincationofmydevice; a Figure 5 is a vertical central section of the same; and i.

Figures 6 and 7 are a front elevatioii' and a central longitudinal section, respectively, of a combined register and damper connected together by' 'ncans oft'he same modification. a a a Letters of likenainc and kind refer to like, parts in each of the figiires. i 1

Myinvention is animprovement in themeans for attaching butterfly-dampersto stove-pipes, and also for connecting saiddampers with vertical registers,and

attaching the same, together with the necessary collar forming theseat of the latter, to a pipe; and to this end y Itconsists, principally,in the employment of a single axial pivot secured toithe edge of a damper, and provided upon itsinner end with a collar or shoulder,

a and upon its outer end with as'crew thread and nut,

or a slot andkey,hy means of which, when said damper is placed in position within the pipe, with said pivot projecting through a suitable opening witl'iin'the-wallof the lattelgthe collar or shoulderupou said pivot shall-bear against the inner side of saidpipe, and the nut or wedge-against itsouter side, and thus firmly hold said damper in, a horizontal position, while at the same'time allowing itto be IeYOlYOd, as is 'hereinaiter specified: y u w a It further consists in holding the register-collar in a position agaiustthe pipe by means of the hereinbeforenamed axial pivot provided "with a shoulder and not, or its equivalent device-,a-ndthereby dispensing with the use of rivets, as is hereinafter shown.

It further consists in employing the spring of the pipe to hold the damper in place, as is hereinafter set to hold the collarfirmly in place by means; of the axial pivot provided-with the shoulder and nut, orthe equiv: alent of the latter, as isihereinafter specified.

It furtherconsists in causing the register to bear firmly, but not rigidly, against the collar, by means of (the spring of thepipe. operating through the axial Corresponding with and fitting upon the faced the collar B is a register, 0, in and through which are provided two openings, D, having leach the form of onefourth of a circle, which openings, when said register is placed in a certain position, coincide withshnilar openings provided withinthe face of said collar, and at other-times come opposite the-solid portions of said face.

7 Erepres ents a butterfly-damper of usual form, hav-- ing secured to and projecting outward from one side thereof a pintle or pivot, I provided at its inner end witli'a shoulder, G, and at its outer end with a screwthread, f, upon which is fitted a nut, H.

Suitable openings, corresponding in size with the pivot F, being providedin'and through the center of theregister and collar, and through the wall of the pipe, said pivot is passed through the same from within the pipe, and the nut placed upon its outer end,when,

by screwing up said nut, the register, collar, and damper are caused to occupy their upon and within the pipe. i

Asemicircularopening-I, provided in and through the wall ofthepipe within the, collar B and above the pivot F, completes this device, the opera'tionof which will be readily understood.

The pivot F serves as an a'xis for both damper E and register 0, and also operates to hold the collar B proper relative positions in position radially, and, by means of the, shoulder G and nut H, a sufiicient-degree of pressure is obtained to hold said collar fiunlyagainst the pipe without the aid of rivets or other equ' rctainsaid register and dp mper in whatever position they may be placed.

- n It will be observed that while the collar and register are firm andunyiclding, the pressure of the shoulder i G upon the thin metal composing the wall of the pipe willcause said Well to spring outward, and that by screwing up the nut H, any degree of pressure can be obtained that may. be required for holding the collar I against thepipe,withont creating undue friction upon the register or shoulder. v

valent devices, and also to,

Many modifications of this method of attaching the damper to a pipe will readily suggest themselves, of which, however, it will be necessary to give but one.

In figs. 6 and 7 are shown a front elevation and a vertical central-section, respectively, of the hereinbefore-described register and damper combined, in which the screw-thread upon the end of the pivot I is replaced by a longitudinal slot passing through the same at a right angle therewith, which serves to receive a tapering key, K,-that, resting upon the face of the register O, presses against the outer end of said slotand draws the pivot outward.

By driving thekey K into or withdrawing it from the slot, the position of the pivot and register will he correspondingly changed, and the pressure between said register, the collar, and the shoulder 1* varied in a like degree.

In order to insure the relative positions of the register and key, two lugs, c, are secured to the former in such a position as to embrace the sides of the latter, and prevent all lateral movement of the same.

In figs. 4; and 5 is shown. the application of this modification to a common butterfly-damper, which is constructed as before, except that the pivot is somewhat shorter, less length being required than when said damper is combined with a register.

-A washer, L, having any form deemed best, is placed hetweeuihe pipe aml key, and furnishes a bearing for the latter. Suitable lugs l, secured to said washer upon either side of the key, connect said parts together aml enable them to be used for adjusting the position of the dan'iper.

It will, of course, be seen that the shown in the last above-described modification may be replaced by a screw and nut, but, in either case, as the shoulder l" is straight or ata right angle to the pivot, whilethe wall of the pipe is curved, said shoulder will naturally touch said pipe only at its outer sides, horizontally, and that, therefore, as the pressure of the nut or wedge is increased or diminished, said pipe will be sprung so as to conform more or less to the shape of the shoulder, by which means an elastic pressure upon the shoulder aml washer is obtained snfiicient'to securely hold the damper when adjusted,without rendering it at all diflicult to change such adjustment.

The especial advantages possessed by thismethod of attaching the damper to a'pipe are:

First. 1t dispenses with one pivot upon the damper 'key aml slot and one opening in the pipe, and renders it far more easy to place said damper inposition within said pipe.

Second. In combining a register with a damper, it renders unnecessary the use of rivets or other equivalent devices for securing the collar in place.

Third. It enables the spring of the pipe to be used for retaining in place the damper, or registers and damper when adjusted to any desired position, and thus renders unnecessary the employment of special locking devices.

Having thus full set forth the nature and merits of my invention,

What I claim as new, and desire to secure by Letters Patent, is-

The means employed for securing the damper in a horizontal position, consisting of the pivot F provided with the shoulder G and the screw-thread f, and the nut H, or its equivalent, substantially as and for the purpose specified.

Also, securing the collar B in position upon the pipe by means of the pivot 1 provided with the shoulder G and screw-thread f, and the nut H, or its equivalent, substantially as shown, and for the purpose described.

Also, causing the spring of ,the pipe to hold the damper in position, when adjusted by means of the hereinbefore described devices, substantially as aml for the purpose shown.

p Also, causing the spring of the pipe to hold the collar B firmly in place by means of the pivot l, shoulder G, screw-thread f, and nut H, or its equivalent, substantially as shown, and for the purpose set forth.

Also, causing the register 0 to bear firmly but not rigidly against the collar B by means of the spring of the pipe operating through the pivot F, shoulder G, screw j, and nut H, or its equivalent, substantially as and for the purpose specified.

Also, the combination of the pipe A, the collar B, the register G, the damper E, the pivot F, the shoulder G, the screw-thread f, and the nut 1-], or its equivalent, substantially as shown and described.

In testimony thatI claim the foregoing, I have hercunto set my hand this 29th day or January, 1870.

WILLIAM J. KEEP.

Witnesses:

Wrnmlnr HELLY,

B. MAeGnnGoR. 

